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Simple and efficient decoupling of compact arrays with parasitic scatterers

Lau, Buon Kiong LU and Bach Andersen, Jørgen (2012) In IEEE Transactions on Antennas and Propagation 60(2). p.464-472
Abstract
Compact arrays such as multiple antennas on a mobile terminal suffer from low efficiency and high correlation between antenna signals. In the present paper, a simple and rigorous procedure for decoupling two closely coupled antennas with a parasitic scatterer is proposed. The parasitic scatterer, which can be an additional antenna, acts as a shield between

two active antenna elements. In contrast to previous studies involving the use of parasitic scatterer for decoupling antennas, we demonstrate using antenna impedances the underlying decoupling mechanism for two arbitrary antennas. By a proper choice of parameters, perfect matching and decoupling can be obtained for a given antenna spacing without extending the overall area used,... (More)
Compact arrays such as multiple antennas on a mobile terminal suffer from low efficiency and high correlation between antenna signals. In the present paper, a simple and rigorous procedure for decoupling two closely coupled antennas with a parasitic scatterer is proposed. The parasitic scatterer, which can be an additional antenna, acts as a shield between

two active antenna elements. In contrast to previous studies involving the use of parasitic scatterer for decoupling antennas, we demonstrate using antenna impedances the underlying decoupling mechanism for two arbitrary antennas. By a proper choice of parameters, perfect matching and decoupling can be obtained for a given antenna spacing without extending the overall area used, and without introducing additional decoupling networks. The price to pay is a reduction of bandwidth relative to that of

widely spaced antennas, which is the case for other decoupling methods as well. Simulation and experimental results are used to substantiate the effectiveness of the proposed design approach on a two-monopole array with an antenna spacing of 0.1 wavelength. Finally, several practical considerations of the proposal are also presented, including the extension of the approach for more than two active antennas and its implementation in mobile terminals. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Antenna array mutual coupling, parasitic antennas, impedance matching
in
IEEE Transactions on Antennas and Propagation
volume
60
issue
2
pages
464 - 472
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000302655100005
  • scopus:84856996426
ISSN
0018-926X
DOI
10.1109/TAP.2011.2173440
project
Radiosystem: Fundamental Limits of Compact MIMO Systems (VR, BKL)
language
English
LU publication?
yes
id
877e5c1a-fcb1-4863-8896-45c155f4cec5 (old id 1769362)
date added to LUP
2011-01-25 11:59:18
date last changed
2017-11-12 03:37:47
@article{877e5c1a-fcb1-4863-8896-45c155f4cec5,
  abstract     = {Compact arrays such as multiple antennas on a mobile terminal suffer from low efficiency and high correlation between antenna signals. In the present paper, a simple and rigorous procedure for decoupling two closely coupled antennas with a parasitic scatterer is proposed. The parasitic scatterer, which can be an additional antenna, acts as a shield between<br/><br>
two active antenna elements. In contrast to previous studies involving the use of parasitic scatterer for decoupling antennas, we demonstrate using antenna impedances the underlying decoupling mechanism for two arbitrary antennas. By a proper choice of parameters, perfect matching and decoupling can be obtained for a given antenna spacing without extending the overall area used, and without introducing additional decoupling networks. The price to pay is a reduction of bandwidth relative to that of<br/><br>
widely spaced antennas, which is the case for other decoupling methods as well. Simulation and experimental results are used to substantiate the effectiveness of the proposed design approach on a two-monopole array with an antenna spacing of 0.1 wavelength. Finally, several practical considerations of the proposal are also presented, including the extension of the approach for more than two active antennas and its implementation in mobile terminals.},
  author       = {Lau, Buon Kiong and Bach Andersen, Jørgen},
  issn         = {0018-926X},
  keyword      = {Antenna array mutual coupling,parasitic antennas,impedance matching},
  language     = {eng},
  number       = {2},
  pages        = {464--472},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Antennas and Propagation},
  title        = {Simple and efficient decoupling of compact arrays with parasitic scatterers},
  url          = {http://dx.doi.org/10.1109/TAP.2011.2173440},
  volume       = {60},
  year         = {2012},
}